The nearest I can get at present is Elrohir. I don't know which twin was born first (and in fact don't remember offhand if they
are twins), but at any rate it only takes care of the heir, and not the old. Eldarion seems more obvious straight-clue-wise, and has old in it, but not heir. And neither seem to refer to records, either of the disc or the archive variety.
Bank to think tank.
P.S. Unless "lore" can count as an old record, and can be smashed into Eorl.